I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
humours humors humorous humerus hummers homers hammers hemmers hombres
humours amours tumours rumours mors lemurs tumors lemures tambours immures demurs remorse mures femurs memoirs muras moras moors rumors morse humors samburs murrs tambouras mores tamburs remoras